64871802 has 12 divisors (see below), whose sum is σ = 140555610. Its totient is φ = 21623928.

The previous prime is 64871783. The next prime is 64871803. The reversal of 64871802 is 20817846.

64871802 is a `hidden beast` number, since 648 + 7 + 1 + 8 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50424201 + 14447601 = 7101^2 + 3801^2 .

It is not an unprimeable number, because it can be changed into a prime (64871803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1801977 + ... + 1802012.

Almost surely, 2^64871802 is an apocalyptic number.

64871802 is an abundant number, since it is smaller than the sum of its proper divisors (75683808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64871802 is a wasteful number, since it uses less digits than its factorization.

64871802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603997 (or 3603994 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 64871802 is about 8054.3033218274. The cubic root of 64871802 is about 401.8080690681.

The spelling of 64871802 in words is "sixty-four million, eight hundred seventy-one thousand, eight hundred two".